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Citation: Zhang Yu-Fen, Lin Qin, Liu Zun-Xiao. Structure and Superconductivity on N-Type Superconductors (Ln_1.85Ce_0.15)CuO_4-y[J]. Acta Physico-Chimica Sinica, ;1991, 7(06): 641-645. doi: 10.3866/PKU.WHXB19910601 shu

Structure and Superconductivity on N-Type Superconductors (Ln_1.85Ce_0.15)CuO_4-y

1.
Laboratory for Applied Physical Chemistry, Institute of Physical Chemistry, Peking University, Beijing 100871; Department of Physics, Peking University

Received Date: 27 April 1991
Available Online: 15 December 1991

In comparison with the structure of hole-doped T phase (La_(2-x)Sr_x)CuO_4, electron-doped superconductors (Ln_(1.85)Ce_(0.15))CuO_(4-y), Ln=Pr, Nd, Sm, Eu, possess T phase structure with tetra nal I4/mmm symmetry. Their structural features are that the Cu ion is coordinated by four oxygen ions in square planar form and the Ln ion is located in octa-coordinate cubic site in the fluorite type LnO_2Ln duble layers. In this paper, the effects of preparation condition and cation substitution on the structure and superconductivity have been studied. Average ionic radius of Ln-site is limited in very narrow range. It can be changed by the substitution of larger or smaller ions. Its dimension is very important for structural type, structural stability under N_2 atmosphere and superconductivity.
- Electron-doped Supereonductors; (Ln_1.85Ce_0.15)CuO_4-y; Ln=Pr,Nd,Sm,Eu,Structure; Superconductivity
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Structure and Superconductivity on N-Type Superconductors (Ln1.85Ce0.15)CuO4-y

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Structure and Superconductivity on N-Type Superconductors (Ln_1.85Ce_0.15)CuO_4-y